Order specification
| Field | Detail |
|---|---|
| Product | Ball valves - trunnion-mounted and floating |
| Project type | Offshore oilfield development, Arabian Gulf |
| Scope | 420+ units; NPS 1/2"–24"; Class 150–1500 |
| Body materials | A216 WCB/WCC, A352 LCC, A351 CF8M, duplex 2205 |
| Governing standards | API 6D, API 608, ISO 17292, ASME B16.34, NACE MR0175, API 607 |
| Year of supply | 2024 |
| Certification | EN 10204 3.1 / 3.2; TPI-witnessed tests |
Scope of Supply
The package was built around the service split typical of an Arabian Gulf offshore development: production and export lines at higher class, sour and seawater-exposed branches in corrosion-resistant alloys, and compact floating valves for utility skids.
| Service | Design | Size | Class | Body / trim | Qty |
|---|---|---|---|---|---|
| Production & export lines | Trunnion, full bore, DBB | NPS 2"–12" | 150–600 | A216 WCB / A105 + ENP | 180 |
| Manifold & tie-in | Trunnion, full bore | NPS 14"–24" | 600–1500 | A352 LCC | 90 |
| Sour / seawater service | Trunnion, metal-seated option | NPS 4"–16" | 300–900 | A351 CF8M / duplex 2205 | 70 |
| Utility & skid | Floating, reduced / full bore | NPS 1/2"–8" | 150–600 | A216 WCB / CF8M | 80 |
Material and Certification
Offshore Arabian Gulf service sets a demanding baseline: reservoir fluids carry H₂S and CO₂, and every external surface sees salt-laden air and periodic seawater splash. The specification answered that with three non-negotiable controls.
Fire safety and antistatics. All valves were fire-safe to API 607 with a graphite secondary seat and antistatic ball-to-stem spring bonding per API 6D Section 22.3 - a baseline for hydrocarbon service, not an upgrade.
Sour-service qualification. Materials followed NACE MR0175 / ISO 15156, with hardness on load-bearing parts held at or below 22 HRC. Duplex 2205 and CF8M were specified where chloride and H₂S partial pressure ruled out carbon steel.
Design and rating. Trunnion valves to API 6D and floating valves to API 608 / ISO 17292, pressure–temperature limits to ASME B16.34. Ends were RF or RTJ flanged (ASME B16.5 / B16.47) or butt-weld (ASME B16.25); external surfaces carried an ISO 12944 C5-M marine coating.
Inspection and Acceptance
A third-party inspector witnessed the pressure tests, so the test record belongs to the shipment rather than a sample. Shell test ran at 1.5× design pressure and seat test at 1.1× design pressure, both to zero leakage. Each valve shipped with an EN 10204 3.1 material certificate, upgraded to 3.2 where the purchase order required a TPI endorsement.
Beyond pressure testing, the acceptance file carried positive material identification on trim, a hardness survey on sour-service parts, and magnetic-particle testing on any welded bodies. Visual and dimensional checks were taken against the purchase order, and API 6D monogramming was applied where specified.
Packaging and Marking
For long marine transit the valves were capped, flange faces were protected, and units were packed in plywood cases with vapour-corrosion-inhibitor paper and desiccant. Cases were tagged with project identifiers, heat numbers and PO references so the receiver could trace any unit back to its mill certificate and test record. Project-specific nameplates, tag numbers and coating colours were applied to order, and actuators - where supplied - were function-tested with the valve as a complete assembly.
API 6D Ball Valves For Offshore Oilfield Project
FAQ
What ball-valve types were supplied for this offshore project?
The package combined trunnion-mounted ball valves for production, manifold and export lines with floating ball valves for utility and skid service. Sizes ran from 1/2" to 24", in pressure classes 150 through 1500. Trunnion units were supplied full bore with double block and bleed for manifold isolation, and floating units covered smaller instrument and utility branches.
How were sour-service and fire-safety requirements met?
Every valve was fire-safe certified to API 607 with a graphite secondary seal and antistatic ball-to-stem bonding per API 6D. Sour-service compliance followed NACE MR0175 / ISO 15156, with hardness on load-bearing parts held at or below 22 HRC. Those two requirements are non-negotiable for Arabian Gulf hydrocarbon service and were verified on the material certificates.
Which body and trim materials were used?
Carbon-steel bodies in A216 WCB/WCC served general hydrocarbon lines; A352 LCC covered low-temperature duty; A351 CF8M (316 stainless) and duplex 2205 were specified for sour and seawater-exposed service. Trim was stainless or hard-faced as the service required. Material choice tracked chloride level, temperature and H2S partial pressure rather than pressure class alone.
What inspection and certification accompanied the shipment?
Valves shipped with EN 10204 3.1 material certificates, upgraded to 3.2 where third-party inspection was specified. A TPI witness attended hydrostatic and seat tests; shell test ran at 1.5x design pressure and seat test at 1.1x with zero leakage. Positive material identification, hardness survey and magnetic-particle testing on welds were recorded against the purchase order.
How were the valves packaged for overseas marine transit?
Each valve was capped, flange faces protected, and packed in plywood cases with vapour-corrosion-inhibitor paper and desiccant for long marine transit. External surfaces carried an ISO 12944 C5-M marine coating. Cases were marked with project tags, heat numbers and PO references so the receiver could trace any unit back to its test record.
Can valves be supplied with actuation and project-specific marking?
Yes. Valves were prepared with ISO 5211 actuator mounting pads and supplied with lever, worm-gear, pneumatic or hydraulic actuation as the line required, including fail-safe configuration for safety loops. Project-specific nameplates, tag numbers and coating colours were applied to the purchase order, and full traceability was maintained from mill certificate to packed case.